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Oracle9i dba new features for Oracle7.3 and Oracle9 ocps Sample Questions:

1. Consider the following scenario using incremental backups. A level 1 backup is taken on the first of the month. A level 2 backup is taken every Sunday, and a level 3 backup is taken daily. If the database gets corrupted on the second Wednesday of the month and is lost, which scenario would restore the database completely?

A) a base level backup (level 0) is missing and nothing can be recovered
B) the monthly backup (level 1) and the daily backup (level 3)
C) the weekly backup (level 2) and the daily backup (level 3)
D) the monthly backup (level 1), the weekly backup (level 2) and the daily backup (level 3)

2. ABC Company consolidated into one office building, so the very large EMPLOYEES table no longer requires the OFFICE_LOCATION column. The DBA decided to drop the column using the syntax below:
ALTER TABLE hr.employees DROP COLUMN building_location CASCADE CONSTRAINTS; Dropping this column has turned out to be very time consuming and is requiring a large amount of undo space.
What could the DBA have done to minimize the problem regarding time and undo space consumption?

A) Add a checkpoint to the DROP UNUSED COLUMNS command to minimize undo space.
B) Mark the column INVALID prior to beginning the drop to bypass undo.
Remove the column using the DROP UNUSED COLUMNS command.
C) Drop all indexes and constraints associated with the column prior to dropping the column.
D) Use the Export and Import utilities to bypass undo.
E) Mark the column as UNUSED.
Remove the column at a later time when less activity is on the system.

3. For the best performance, what should be done with blocks transferred using the Cache Fusion algorithm in a Real Application Clusters database?

A) They should be granted, by the Global Cache Service, an exclusive mode resource for each instance involved.
B) They should be transferred through the cache area of the Global Resource Directory on the instance where the block is mastered.
C) They should be written to disk by the sending instance and read from disk by the receiving instance.
D) They should be transferred across a high-speed cluster interconnect.

4. In order to speed foreign key creation, Oracle9i will cache the first _____ primary key values only where there are multirow DML statements.

A) 32
B) 256
C) 512
D) 128

5. Using a bitmap structure to manage database object space has several benefits over using freelist structures.
Which three are benefits of managing space using automatic segment-space managed objects? (Choose three.)

A) It readily responds to dynamic changes for concurrent access.
B) It improves performance for SYSTEM tablespaces where a high degree of concurrency is required.
C) It improves performance and space utilization in a multi-instance environment.
D) It requires fewer space related options than freelist managed structures.

Solutions: